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/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
* Qwt Widget Library
* Copyright (C) 1997 Josef Wilgen
* Copyright (C) 2002 Uwe Rathmann
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the Qwt License, Version 1.0
*****************************************************************************/
#ifndef QWT_SLDBASE_H
#define QWT_SLDBASE_H
#include <qframe.h>
#include <qpixmap.h>
#include <qdatetime.h>
#include "qwt_global.h"
#include "qwt_drange.h"
/*!
\brief A Base class for sliders
QwtSliderBase is a base class for
slider widgets. QwtSliderBase handles the mouse events
and updates the slider's value accordingly. Derived classes
only have to implement the getValue() and
getScrollMode() members, and should react to a
valueChange(), which normally requires repainting.
*/
class QWT_EXPORT QwtSliderBase : public QWidget, public QwtDblRange
{
Q_OBJECT
Q_PROPERTY( bool readOnly READ isReadOnly WRITE setReadOnly )
Q_PROPERTY( bool valid READ isValid WRITE setValid )
Q_PROPERTY( double mass READ mass WRITE setMass )
Q_PROPERTY( Orientation orientation READ orientation WRITE setOrientation )
public:
enum ScrollMode { ScrNone, ScrMouse,
ScrTimer, ScrDirect, ScrPage };
QwtSliderBase(Qt::Orientation orientation, QWidget *parent = 0,
const char *name = 0, Qt::WFlags flags = 0 );
virtual ~QwtSliderBase();
void setUpdateTime(int t);
void stopMoving();
void setTracking(bool enable);
virtual void setMass(double val);
virtual double mass() const;
virtual void setOrientation(Orientation o);
Orientation orientation() const;
bool isReadOnly() const;
/*
Wrappers for QwtDblRange::isValid/QwtDblRange::setValid made
to be available as Q_PROPERTY in the designer.
*/
/*!
\sa QwtDblRange::isValid
*/
bool isValid() const { return QwtDblRange::isValid(); }
/*!
\sa QwtDblRange::isValid
*/
void setValid(bool valid) { QwtDblRange::setValid(valid); }
public slots:
virtual void setValue(double val);
virtual void fitValue(double val);
virtual void incValue(int steps);
virtual void setReadOnly(bool);
signals:
/*!
\brief Notify a change of value.
In the default setting
(tracking enabled), this signal will be emitted every
time the value changes ( see setTracking() ).
\param value new value
*/
void valueChanged(double value);
/*!
This signal is emitted when the user presses the
movable part of the slider (start ScrMouse Mode).
*/
void sliderPressed();
/*!
This signal is emitted when the user releases the
movable part of the slider.
*/
void sliderReleased();
/*!
This signal is emitted when the user moves the
slider with the mouse.
\param value new value
*/
void sliderMoved(double value);
protected:
void setPosition(const QPoint &p);
virtual void valueChange();
virtual void timerEvent(QTimerEvent *e);
virtual void mousePressEvent(QMouseEvent *e);
virtual void mouseReleaseEvent(QMouseEvent *e);
virtual void mouseMoveEvent(QMouseEvent *e);
virtual void keyPressEvent(QKeyEvent *e);
virtual void wheelEvent(QWheelEvent *e);
/*!
\brief Determine the value corresponding to a specified poind
This is an abstract virtual function which is called when
the user presses or releases a mouse button or moves the
mouse. It has to be implemented by the derived class.
\param p point
*/
virtual double getValue(const QPoint & p) = 0;
/*!
\brief Determine what to do when the user presses a mouse button.
This function is abstract and has to be implemented by derived classes.
It is called on a mousePress event. The derived class can determine
what should happen next in dependence of the position where the mouse
was pressed by returning scrolling mode and direction. QwtSliderBase
knows the following modes:<dl>
<dt>QwtSliderBase::ScrNone
<dd>Scrolling switched off. Don't change the value.
<dt>QwtSliderBase::ScrMouse
<dd>Change the value while the user keeps the
button pressed and moves the mouse.
<dt>QwtSliderBase::ScrTimer
<dd>Automatic scrolling. Increment the value
in the specified direction as long as
the user keeps the button pressed.
<dt>QwtSliderBase::ScrPage
<dd>Automatic scrolling. Same as ScrTimer, but
increment by page size.</dl>
\param p point where the mouse was pressed
\retval scrollMode The scrolling mode
\retval direction direction: 1, 0, or -1.
*/
virtual void getScrollMode( const QPoint &p,
int &scrollMode, int &direction) = 0;
int d_scrollMode;
double d_mouseOffset;
int d_direction;
int d_tracking;
private:
void buttonReleased();
int d_tmrID;
int d_updTime;
int d_timerTick;
QTime d_time;
double d_speed;
double d_mass;
Qt::Orientation d_orientation;
bool d_readOnly;
};
#endif
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